Let me put it this way;
No character has fundamentally changed their core playstyle at all throughout the history of Smash. This isn't special to Ganondorf. He's going to always play in that core playstyle.
We only lose a moveset outright because we lost a character. Not through evolution. It's still the core moveset, but evolved. It may not always be what people want, but let's not oversell it. We didn't get the moveset back because Toon Link was brought in and Young Link was cut. They actually play differently. So it's not that kind of situation.
I don't expect any character to ever have this situation. In addition;
The whole projectile thing is overplayed. Ganondorf was mainly that in OOT, and he only slightly uses them in other fights. But that's because they were updating the Aganahim Boss Battle in general, so it's far more meaningful than "just reflect". Albeit, the triple Aga(or Aga 2 Fight as some call it) was neat, but more annoying than meaningful. Letting you use Items to actually damage the Boss made it very easy to adapt into other games. That's what DMV ultimately was, an adaptable move that easy to reflect and used by tons of Bosses(because it's damn easy to learn). Ganondorf never used it again. An alternate Ganon used it in FSA(who is a different person, basically), and Yuga knows how to use it, though we never the normal Ganon from the timelines(the same person as the one in OOT) ever use it. Then again, it makes sense. Instead of using a highly exploitable move, he uses better ones since then. Where they don't leave him vulnerable easily. It's a cool move, but ultimately it's a move meant to show weakness(and be fun).
Ganondorf is also far more weapon and physical heavy too. He literally punches Link in Wind Waker. Flame Choke came from TP. Even some of his magic in OOT is clearly physical-based(his Ground Pound is part of it), and his Forward Air is based upon OOT artwork. Yes, he's supposed to be physical. He still would've been a lot like that anyway even if he started in Brawl. He might even be worse, since his battles are not seen much, so he doesn't have a lot of skills that can be easily put together for a coherent moveset like the one we have now(with only two moves being kind of awkward; Volcano Kick and Dark Dive. Neither somewhat fit his capabilities from the games, whether it's through animations or otherwise. Sure, they're not hard for him to pull off. He uses Electricity in canon anyway. And Fire). People really do overstate how different he would be. He's not going to be a fast projectile-heavy character. DMV didn't even have a name till the DS era, nor would it be retconned into that name for the sake of it. The character is supposed to be on the slower side. He's a heavyweight by design(and always has been). Whether it's leaning somewhat towards a middle-heavyweight or not(yes, I do think him being overarmored in his TP design was not that fitting. He also, while agile, isn't that fast in WW. The way he is in his OOT design in Smash is somewhat faster than a heavyweight could be, much like in Melee, but he's no middle-weight speed either. Which makes sense anyway).
The thing is? When I look at every character(at least ones I know about), I can't say anything feels outright off about them. They follow an interesting playstyle that ultimately works with their personality. Sure, some clearly could be a tad better(Daisy, Richter, Dark Samus) and could lack a move or two(Ganondorf not having a Reflector is actually pretty weird. Like, uh... that's something that fits his outright playstyle and would help him. And it's not just for the sake of trying to put in a move he rarely uses too. It's to actually improve him and compliment his style).
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I also never spoke one bit about removing Ganondorf and putting in a completely different one with a new moveset. So I don't know why that was brought up. That's an entirely different argument to be made. It's also never happened once(no, Toon Link doesn't count. He's a different character altogether and was based upon Link and Young Link's animations. They shared the same role as a Kid Link and Clone, but it wasn't for the sake of replacing a moveset. Besides that, they obviously have similar but distinct ones. Which is why Toon Link isn't treated as Young Link or an evolution of him. He's really not. Having the same role isn't the same thing as outright being put in to replace a character to "reuse the moveset". Not that he doesn't seem kind of like one, since everyone else evolved into their Gamecube designs. But while that was a good theory at the time, we know better otherwise since Ultimate hard separates them. It probably helps that they are different bodyshapes, so one can't be an evolution of the other that way. No character changed their bodyshape outright to evolve their moveset.
But anyway, I am not remotely convinced it'll happen. Also, keep in mind; people don't need to loosen up here. It's not a problem. They don't need to be convinced it'll happen. Some won't be. There's no need to act like they're trying to bring you down. That's not what they're doing. They're being realistic to the scenario being presented and nothing more. Both views are perfectly fine to begin with. It doesn't matter who is wrong or right at all anyway. Either the argument is good enough for you or isn't. Again, no big deal.